Results 11 to 20 of about 748,203 (294)
Convex optimization of contour deformations [PDF]
Physical Review DWe discuss various formal aspects of contour deformations used to alleviate sign problems; most importantly, relating these contour deformations to a certain convex optimization problem. As a consequence of this connection we describe a general method for proving upper bounds on the average phase achievable by the contour deformation method. Using this
Scott Lawrence, Yukari Yamauchi
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Deformable contours: modeling and extraction [PDF]
Proceedings of IEEE Conference on Computer Vision and Pattern Recognition CVPR-94, 1994 This paper considers the problem of modeling and extracting arbitrary deformable contours from noisy images. We propose a global contour model based on a stable and regenerative shape matrix, which is invariant and unique under rigid motions. Combined with Markov random field to model local deformations, this yields prior distribution that exerts ...
Chin, Roland T, Lai, Kok F
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Physics and Imaging in Radiation Oncology, 2023 Background and Purpose: Deformable image registration (DIR) is a core element of adaptive radiotherapy workflows, integrating daily contour propagation and/or dose accumulation in their design.
Lando S Bosma +4 more
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Evaluating Parametric Integrals in the Minkowski Regime without Contour Deformation [PDF]
We present selected examples demonstrating an alternative approach to contour deformation for numerically computing loop integrals in the Minkowski regime.
Jones, Stephen +2 more
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Hermite deformable contours [PDF]
Proceedings of 13th International Conference on Pattern Recognition, 1996 We propose the Hermite representation for deformable contour finding. This representation compares favorably in terms of versatility and controllability with other local contour representations that have been used previously for this purpose. The Hermite representation allows a compact representation of curved shapes, without the smoothing out of ...
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What Property of the Contour of a Deforming Region Biases Percepts toward Liquid?
Frontiers in Psychology, 2017 Human observers can perceive the existence of a transparent surface from dynamic image deformation. They can also easily discriminate a transparent solid material such as plastic and glass from a transparent fluid one such as water and shampoo just by ...
Takahiro Kawabe
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Numerical evaluation of oscillatory integrals via automated steepest descent contour deformation [PDF]
, 2023 Steepest descent methods combining complex contour deformation with numerical quadrature provide an efficient and accurate approach for the evaluation of highly oscillatory integrals.
Hewett, D. P., Huybrechs, D., Gibbs, A.
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Discriminative learning of deformable contour models [PDF]
2014 IEEE 11th International Symposium on Biomedical Imaging (ISBI), 2014 In this work we propose a machine learning approach to improve shape detection accuracy in medical images with deformable contour models (DCMs). Our DCMs can efficiently recover globally optimal solutions that take into account constraints on shape and appearance in the model fitting criterion; our model can also deal with global scale variations by ...
Haithem Boussaid +2 more
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Contour Tracking Algorithm Based on Online Regression Learning [PDF]
Jisuanji gongcheng, 2016 To solve the problem of fault tracking result from rapid movement and severe deformation,a contour tracking algorithm is proposed.The training samples are generated by cyclic shifts of the current tracking area with a cyclic matrix,which is used for ...
SHEN Songyan,CHEN Ying
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Robust Video Object Segmentation via Propagating Seams and Matching Superpixels
IEEE Access, 2020 Video object segmentation aims at separating foreground object from background, and it is far from well solved for different challenges such as deformation, occlusion and motion blurs.
Yun Liang +4 more
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